Improve performance of last() call on TreeMap

[craffit]

No description provided.

[codecov-io]

Codecov Report

Merging #2400 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master    #2400      +/-   ##
============================================
- Coverage     95.79%   95.79%   -0.01%     
- Complexity     5427     5428       +1     
============================================
  Files            94       94              
  Lines         13110    13113       +3     
  Branches       1608     1608              
============================================
+ Hits          12559    12561       +2     
- Misses          404      405       +1     
  Partials        147      147

Impacted Files	Coverage Δ	Complexity Δ
vavr/src/main/java/io/vavr/collection/TreeMap.java	94.29% <100%> (+0.06%)	165 <2> (+2)	⬆️
...vr/src/main/java/io/vavr/collection/SortedMap.java	66.66% <0%> (-33.34%)	2% <0%> (-1%)

---

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[codecov-io]

Codecov Report

Merging #2400 into master will decrease coverage by <.01%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master    #2400      +/-   ##
============================================
- Coverage     95.79%   95.79%   -0.01%     
- Complexity     5427     5428       +1     
============================================
  Files            94       94              
  Lines         13110    13113       +3     
  Branches       1608     1608              
============================================
+ Hits          12559    12561       +2     
- Misses          404      405       +1     
  Partials        147      147

Impacted Files	Coverage Δ	Complexity Δ
vavr/src/main/java/io/vavr/collection/TreeMap.java	94.29% <100%> (+0.06%)	165 <2> (+2)	⬆️
...vr/src/main/java/io/vavr/collection/SortedMap.java	66.66% <0%> (-33.34%)	2% <0%> (-1%)

---

Continue to review full report at Codecov.

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Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update f34c252...4b3f272. Read the comment docs.

[danieldietrich]

Awesome, thank you - I think we missed that one :)